High-power femtosecond all-fiber laser system a 1.5 μm with a fundamental repetition rate of 4.9 GHz

作者：Chen, Xuewen; Lin, Wei; Wang, Wenlong; Guan, Xianchao; Wen, Xiaoxiao; Qiao, Tian; Wei, Xiaoming^*; Yang, Zhongmin

来源：Optics Letters, 2021, 46(8): 1872-1875.

DOI：10.1364/OL.418331

• SOLITON

In this Letter, we demonstrate a high-power femtosecond all-fiber laser system at 1.5 mu m that operates at a fundamental repetition rate of up to 4.9 GHz. This high repetition rate laser system delivers an average power of 10 W and a pulsewidth of 63 fs in an all-fiber configuration-the best overall performance at 1.5 mu m, so far, in terms of the all- fiber design, high average power, short pulsewidth, and high fundamental repetition rate. Integrated from 10 Hz to 10 MHz, this high-power femtosecond all-fiber laser system exhibits a relative intensity noise of only 0.4%. It is anticipated that this femtosecond laser system is promising for various applications, such as high-speed micromachining, wide-field multiphoton bioimaging, and nonlinear optics.